<template>
  <div class="article-detail__container">
    <!-- Header 区域 -->
    <van-nav-bar
      fixed
      title="文章详情"
      left-arrow
      @click-left="$router.go(-1)"
    />

    <!-- 文章信息区域 -->
    <div class="article-container" v-if="!loading">
      <!-- 文章标题 -->
      <h1 class="art-title">{{ artObj.title }}</h1>

      <!-- 用户信息 -->
      <van-cell
        center
        :title="artObj.aut_name"
        :label="$timeAgo(artObj.pubdate)"
      >
        <template #icon>
          <img :src="artObj.aut_photo" alt="avatar" class="avatar" />
        </template>
        <template #default>
          <div>
            <van-button
              v-if="artObj.is_followed"
              type="info"
              size="mini"
              @click="followOrUnfollowFn"
              >已关注</van-button
            >
            <van-button
              v-else
              icon="plus"
              type="info"
              size="mini"
              plain
              @click="followOrUnfollowFn"
              >关注</van-button
            >
          </div>
        </template>
      </van-cell>

      <!-- 分割线 -->
      <van-divider>Start</van-divider>

      <!-- 文章内容 -->
      <div class="art-content" v-html="artObj.content"></div>

      <!-- 分割线 -->
      <van-divider>End</van-divider>

      <!-- 点赞 -->
      <div class="like-box">
        <van-button
          v-if="artObj.attitude === 1"
          icon="good-job"
          type="danger"
          size="small"
          @click="likeOrDislikeFn"
          >已点赞</van-button
        >
        <van-button
          v-else
          icon="good-job-o"
          type="danger"
          plain
          size="small"
          @click="likeOrDislikeFn"
          >点赞</van-button
        >
      </div>
    </div>

    <!-- 评论 -->
    <comment />
  </div>
</template>

<script>
// 目标：关注和取关
// 1. 定义接口 -> 调接口
// 2.更新vue变量 -> 更新视图
import {
  getArticleDetailAPI,
  followAutAPI,
  unfollowAutAPI,
  likeArticleAPI,
  dislikeArticleAPI
} from '@/api/Article'

import Comment from './Comment'
export default {
  name: 'ArticleDetail',
  components: { Comment },
  data () {
    return {
      artObj: {}, // 文章详情对象
      loading: false // 文章详情数据的加载状态
    }
  },
  async created () {
    /**
     * 解决数据重复的两种方式：
     * 1. 换钩子：
     *   created -> activated
     *   deactivated
     * 2.区分缓存
     */
    this.loading = true
    // 开启加载中的提示
    const t = this.$toast.loading({
      message: '加载中...',
      forbidClick: true,
      duration: 0
    })
    const resp = await getArticleDetailAPI({
      articleId: this.$route.query.art_id
    })
    this.loading = false
    // 关闭加载中的提示
    t.clear()
    this.artObj = resp.data
  },
  methods: {
    // 关注 或 取关
    async followOrUnfollowFn () {
      try {
        // 1. 状态同步给后台 -> 调接口
        this.artObj.is_followed
          ? await unfollowAutAPI({ authorId: this.artObj.aut_id })
          : await followAutAPI({
            authorId: this.artObj.aut_id
          })
        // 成功的提示
        this.$toast.success(this.artObj.is_followed ? '取关成功' : '关注成功')
        // 2. 状态同步到视图 -> 改vue变量
        this.artObj.is_followed = !this.artObj.is_followed
      } catch (e) {
        // 失败的提示
        this.$toast.fail(this.artObj.is_followed ? '取关失败' : '关注失败')
      }
    },
    // 点赞 或 取赞
    async likeOrDislikeFn () {
      try {
        this.artObj.attitude === 1
          ? await dislikeArticleAPI({
            articleId: this.artObj.art_id
          })
          : await likeArticleAPI({ articleId: this.artObj.art_id })
        this.$toast.success(
          this.artObj.attitude === 1 ? '取赞成功' : '点赞成功'
        )
        this.artObj.attitude = this.artObj.attitude === 1 ? -1 : 1
      } catch (e) {
        this.$toast.fail(this.artObj.attitude === 1 ? '取赞失败' : '点赞失败')
      }
    }
  }
}
</script>
//
https://www.bilibili.com/video/BV12Z4y1w7sf?from=search&seid=7527738064220521683&spm_id_from=333.337.0.0

<style scoped lang="less">
.article-container {
  padding: 10px;
  margin-top: 46px;
}
.art-title {
  font-size: 16px;
  font-weight: bold;
  margin: 10px 0;
}

.art-content {
  font-size: 12px;
  line-height: 24px;
  width: 100%;
  overflow-x: scroll;
  word-break: break-all;
  /deep/ img {
    width: 100%;
  }
  /deep/ pre {
    white-space: pre-wrap;
    word-wrap: break-word;
  }
}

.van-cell {
  padding: 5px 0;
  &::after {
    display: none;
  }
}

.avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #f8f8f8;
  margin-right: 5px;
  border: none;
}

.like-box {
  display: flex;
  justify-content: center;
}
</style>
